body {
  background-color: #f5f5f5;
  font-size: 12px;
  font-family: Arial, Helvetica, sans-serif
}

.wrapper_01 {
  width: 1100px;
  margin: 0 auto;
}

.wrapper_02 {
  width: 980px;
  margin: 0 auto;
}

.wrapper_03 {
  width: 982px;
  margin: 0 auto;
}